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<div class="title">C:/Users/Sam/Projects/FRC/Libraries/Fpk/Entech-Fpk-Subscribers/Entech-Fpk/Operation.hpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// Have include guard.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#ifndef FPK_OPERATION_HPP</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define FPK_OPERATION_HPP</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// Include files.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &lt;boost/smart_ptr/shared_ptr.hpp&gt;</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#include &quot;Subscriber.hpp&quot;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno"><a class="code" href="struct_unspecified.html">    9</a></span>&#160;<span class="keyword">struct </span><a class="code" href="struct_unspecified.html">Unspecified</a></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;{</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;};</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Result&gt;</div>
<div class="line"><a name="l00014"></a><span class="lineno"><a class="code" href="class_operation.html">   14</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_operation.html">Operation</a>;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a name="l00022"></a><span class="lineno"><a class="code" href="class_operation_3_01_unspecified_01_4.html">   22</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_operation.html">Operation</a>&lt;<a class="code" href="struct_unspecified.html">Unspecified</a>&gt; :</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;        <span class="keyword">public</span> <a class="code" href="class_subscriber.html">Subscriber</a></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;{</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;        <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="class_subscriber.html">Subscriber</a>;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;        </div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Result&gt;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;        <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="class_operation.html">Operation</a>;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;        </div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;                <span class="keywordtype">bool</span> m_isFinished;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;                boost::shared_ptr&lt;Subscriber &gt; m_pointerSelfHack;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;                <span class="keyword">mutable</span> ReentrantSemaphore m_semaphore;</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;                <span class="keyword">mutable</span> std::stack&lt;int&gt; m_tasksWaiting;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;        <span class="keyword">public</span>:</div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="code" href="class_operation_3_01_unspecified_01_4.html#a0cbf505128c36650e485825c014d9b54">   39</a></span>&#160;                <a class="code" href="class_operation.html#aeedcfd7cde6bc8b02160ed6f3ad05367">Operation</a>() :</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;                        m_isFinished(false)</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;                {</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;                        SetIsSubscribed(<span class="keyword">true</span>);</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;                }</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;                </div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="class_operation_3_01_unspecified_01_4.html#adf1c5f571174957f3a6246b7eccb7513">   50</a></span>&#160;                <span class="keywordtype">bool</span> GetIsFinished()<span class="keyword"> const</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="keyword">                </span>{</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;                        <span class="keywordtype">bool</span> isFinished;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;                        </div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;                        m_semaphore.take();</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;                        </div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;                        isFinished = m_isFinished;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                        </div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;                        m_semaphore.give();</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;                        </div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                        <span class="keywordflow">return</span> isFinished;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                }</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;                </div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="code" href="class_operation_3_01_unspecified_01_4.html#ab17411ba4439387367923863817d1d8f">   69</a></span>&#160;                <span class="keywordtype">void</span> <a class="code" href="class_operation.html#afaa85007ff78f9aaa819ed75e220f5b7">Wait</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="keyword">                </span>{</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                        <span class="keywordflow">if</span> (GetIsFinished())</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;                                <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;                        </div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                        <span class="keywordtype">int</span> taskId = taskIdSelf();</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;                        </div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;                        m_semaphore.take();</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;                        m_tasksWaiting.push(taskId);</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;                        m_semaphore.give();</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;                        </div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;                        <span class="comment">/*</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="comment">                         * Hmm, on the one hand, this has to be outside the semaphore lock</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="comment">                         * to avoid a deadlock.  However, after pushing the task to the stack,</span></div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="comment">                         * but before suspending, the operation could finish.  Which would cause</span></div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="comment">                         * this task to get suspended forever with nothing to resume it.</span></div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">                         */</span></div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                        taskSuspend(taskId);</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;                }</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;                </div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="code" href="class_operation_3_01_unspecified_01_4.html#acd6fc878b1e4f89e18078a43ce48cc4b">   92</a></span>&#160;                <span class="keywordtype">void</span> Cancel()</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;                {</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;                        CancelInternal();</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;                }</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00100"></a><span class="lineno"><a class="code" href="class_operation_3_01_unspecified_01_4.html#af22d2b49e6477c160828dad405de0a23">  100</a></span>&#160;                <span class="keyword">virtual</span> <span class="keywordtype">void</span> HandleLaunch()</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;                {</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;                }</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;                <span class="keywordtype">void</span> FinishInternal()</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;                {</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;                        m_semaphore.take();</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;                        </div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;                        m_isFinished = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;                        </div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;                        <span class="keywordflow">while</span> (m_tasksWaiting.size() &gt; 0)</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;                        {</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;                                taskResume(m_tasksWaiting.top());</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;                                m_tasksWaiting.pop();</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;                        }</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;                        </div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;                        m_parent-&gt;RemoveOperation(<span class="keyword">this</span>);</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;                        </div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;                        m_semaphore.give();</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;                }</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;                </div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;                <span class="keyword">virtual</span> <span class="keywordtype">void</span> CancelInternal()</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;                {</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;                }</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;};</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Result = <span class="keywordtype">void</span>&gt;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="keyword">class </span><a class="code" href="class_operation.html">Operation</a> :</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;        <span class="keyword">public</span> <a class="code" href="class_operation.html">Operation</a>&lt;Unspecified&gt;</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;{</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;                Result m_result;</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;        <span class="keyword">public</span>:</div>
<div class="line"><a name="l00149"></a><span class="lineno"><a class="code" href="class_operation.html#aeedcfd7cde6bc8b02160ed6f3ad05367">  149</a></span>&#160;                <a class="code" href="class_operation.html#aeedcfd7cde6bc8b02160ed6f3ad05367">Operation</a>(Result cancelResult = Result()) :</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;                        m_result(cancelResult)</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;                {</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;                }</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;                </div>
<div class="line"><a name="l00162"></a><span class="lineno"><a class="code" href="class_operation.html#afaa85007ff78f9aaa819ed75e220f5b7">  162</a></span>&#160;                Result <a class="code" href="class_operation.html#afaa85007ff78f9aaa819ed75e220f5b7">Wait</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;<span class="keyword">                </span>{</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;                        <a class="code" href="class_operation.html#afaa85007ff78f9aaa819ed75e220f5b7">Operation&lt;Unspecified&gt;::Wait</a>();</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;                        </div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;                        <span class="keywordflow">return</span> m_result;</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;                }</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;        <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00174"></a><span class="lineno"><a class="code" href="class_operation.html#a481876d2955554f011da1ce5310f9ad0">  174</a></span>&#160;                <span class="keywordtype">void</span> <a class="code" href="class_operation.html#a481876d2955554f011da1ce5310f9ad0">Finish</a>(Result result)</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;                {</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;                        m_result = result;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;                        FinishInternal();</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;                }</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;                </div>
<div class="line"><a name="l00185"></a><span class="lineno"><a class="code" href="class_operation.html#aa2c6d13916ee7cb0e4106ffec37960e7">  185</a></span>&#160;                <span class="keyword">virtual</span> Result <a class="code" href="class_operation.html#aa2c6d13916ee7cb0e4106ffec37960e7">HandleCancel</a>()</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;                {</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;                        <span class="keywordflow">return</span> Result();</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;                }</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;                <span class="keyword">virtual</span> <span class="keywordtype">void</span> CancelInternal()</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;                {</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;                        <a class="code" href="class_operation.html#a481876d2955554f011da1ce5310f9ad0">Finish</a>(<a class="code" href="class_operation.html#aa2c6d13916ee7cb0e4106ffec37960e7">HandleCancel</a>());</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;                }</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;};</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;<span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a name="l00205"></a><span class="lineno"><a class="code" href="class_operation_3_01void_01_4.html">  205</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_operation.html">Operation</a>&lt;void&gt; :</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;        <span class="keyword">public</span> <a class="code" href="class_operation.html">Operation</a>&lt;Unspecified&gt;</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;{</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;        <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00212"></a><span class="lineno"><a class="code" href="class_operation_3_01void_01_4.html#acaa3f225ddbf05614aee3206fc013124">  212</a></span>&#160;                <span class="keywordtype">void</span> <a class="code" href="class_operation.html#a481876d2955554f011da1ce5310f9ad0">Finish</a>()</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;                {</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;                        FinishInternal();</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;                }</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;                </div>
<div class="line"><a name="l00220"></a><span class="lineno"><a class="code" href="class_operation_3_01void_01_4.html#a903742f05a49c18fbef8291f78d2fb38">  220</a></span>&#160;                <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_operation.html#aa2c6d13916ee7cb0e4106ffec37960e7">HandleCancel</a>()</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;                {</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;                }</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;                <span class="keyword">virtual</span> <span class="keywordtype">void</span> CancelInternal()</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;                {</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;                        <a class="code" href="class_operation.html#aa2c6d13916ee7cb0e4106ffec37960e7">HandleCancel</a>();</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;                        <a class="code" href="class_operation.html#a481876d2955554f011da1ce5310f9ad0">Finish</a>();</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;                }</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;};</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;<span class="preprocessor">#endif // #ifndef FPK_OPERATION_HPP</span></div>
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